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2015-04-11
Kherson oblast. Gen Gorka. |
© Uri Muhin
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Lesser Black-backed Gull is similar to Caspian Gull in coloring but mantle and scapulars are black or slate-black; legs are always yellow. Juveniles are same to juvenile Caspian Gulls but much darker: grey-brownish color is replaced by almost black. In size Lesser Black-headed Gull is slightly less than Caspian Gull: wing 395-450, tarsus 55-65, bill 45-55 mm.
"Птицы Казахстана" том 2. "Наука". Алма-Ата, 1962.